@import 'constants';


// Replace `$search` with `$replace` in `$string`
// @author Hugo Giraudel
// @param {String} $string - Initial string
// @param {String} $search - Substring to replace
// @param {String} $replace ('') - New value
// @return {String} - Updated string
@function str-replace($string, $search, $replace: '') {
    $index: str-index($string, $search);

    @if $index {
        @return str-slice($string, 1, $index - 1) + $replace + str-replace(str-slice($string, $index + str-length($search)), $search, $replace);
    }

    @return $string;
}


@function tan($angel) {
    $angel: abs($angel);

    @if(map_has_key($TAN, $angel)) {
        @return map_get($TAN, $angel);
    }

    @warn 'Define the value of tangent for '+$angel + ' in _constatnts.scss';

    @return 1;
}


// get scheme from collection by name
@function get-scheme($name) {
    @if(type-of($name) == 'map') {
        @return $name;
    }

    $schemes-registry: () !global !default;

    @if(map_has_key($schemes-registry, $name)) {
        @return map_get($schemes-registry, $name);
    }

    @return ();
}


@function register-scheme($scheme) {
    $schemes-registry: () !global !default;
    $schemes-registry: map_merge($schemes-registry, (
        map_get($scheme, name): $scheme,
    )) !global;

    @return $scheme;
}


@function map-get-default-map($map, $key) {
    @if(map_has_key($map, $key)) {
        @return map_get($map, $key);
    }

    @return ();
}


@function map-merge-all($maps...) {
    $result: ();

    @each $map in $maps {
        $result: map_merge($result, $map);
    }

    @return $result;
}


@function map-merge-deep($maps...) {
    $result: ();

    @each $map in $maps {
        @each $key, $value in $map {
            @if(map_has_key($result, $key) and type_of(map_get($result, $key)) == 'map' and type_of($value) == 'map') {
                $result: map_merge($result, (
                    $key: map-merge-deep(map_get($result, $key), $value),
                ));
            } @else {
                $result: map_merge($result, (
                    $key: $value,
                ));
            }
        }
    }

    @return $result;
}


@function blend($color1, $color2) {
    $r1: red($color1);
    $g1: green($color1);
    $b1: blue($color1);
    $a1: opacity($color1);

    $r2: red($color2);
    $g2: green($color2);
    $b2: blue($color2);
    $a2: opacity($color2);

    $r: min(255, round($r1 * (1 -  $a2) + $r2 * $a2));
    $g: min(255, round($g1 * (1 -  $a2) + $g2 * $a2));
    $b: min(255, round($b1 * (1 -  $a2) + $b2 * $a2));

    @return rgba($r, $g, $b, $a1);
}